That's why this thread is here in The China Shop.

I don't know whether the lower minimum FC/CYA levels for SWCG pools are due to the more consistent dosing or due to the superchlorination of some of the water passing through the cell. It's likely to be some combination of both. Obviously, the superchlorination doesn't do anything for algae stuck on pool surfaces and would only affect planktonic (free-floating) algae.

It would not be hard to have a separate recommendation/table for SWCG pools compared to manually dosed pools without having to go into detailed explanations for why. Since SWCG pools have the pH rise problem and since that is proportional to the SWCG on-time which is proportional to the daily chlorine demand which is proportional to the FC level assuming a constant CYA level, it is important to have the lowest effective FC level in order to minimize the rate of pH rise.